Consider a single$-$period binomial model $($crudely$)$ representing the one$-$day evolution of the futures price of gold, for some given delivery date that is fixed throughout. The futures price of gold today is $$1,000.$ At the end of the single period, the futures price of gold can be either $$900$ or $$1,100.($The numbers are of course silly, but they serve to simplify the calculations.$)$ Suppose you go long one futures contract today and you close out the position tomorrow. What is the value of the futures today? What is your cash flow in the up and down scenarios? What does that imply for the risk$-$neutral probability p$*$ of an up move of the futures price?